How severe is GHSA-jwh2-vrr9-vcp2?

No CVSS score has been assigned to GHSA-jwh2-vrr9-vcp2 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-jwh2-vrr9-vcp2?

GHSA-jwh2-vrr9-vcp2 affects the following packages: mz-avro (crates.io). Ecosystems affected: crates.io.

How do I fix GHSA-jwh2-vrr9-vcp2?

Update mz-avro to 0.7.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-jwh2-vrr9-vcp2 is resolved across your whole dependency graph.

How do I detect GHSA-jwh2-vrr9-vcp2 in my crates.io dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mz-avro, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-jwh2-vrr9-vcp2 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-jwh2-vrr9-vcp2 actively exploited in the wild?

No public exploit code has been indexed for GHSA-jwh2-vrr9-vcp2 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-jwh2-vrr9-vcp2 published, and has it been updated?

GHSA-jwh2-vrr9-vcp2 was published on August 30, 2022 and was last updated on November 8, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🦀 crates.io

Not in CISA KEV

mz-avro's incorrect use of `set_len` allows for un-initialized memoryGHSA-jwh2-vrr9-vcp2

GHSA-jwh2-vrr9-vcp2 is a security vulnerability in mz-avro. A fix is available for mz-avro — see the affected versions and patch details below.

Also known asRUSTSEC-2021-0138

Published

Aug 30, 2022

Updated

Nov 8, 2023

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 8, 2023 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🦀mz-avro

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation.

Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.

Note: there is only UB in the case where a user provides a struct whose Read implementation inspects the buffer passed to read_exact before writing to it. This is an unidiomatic (albeit possible) Read implementation.

See https://github.com/MaterializeInc/materialize/issues/8669 for details.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🦀crates.io	`mz-avro`	all versions	0.7.0`cargo update -p mz-avro --precise 0.7.0`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mz-avro, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update mz-avro to 0.7.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-jwh2-vrr9-vcp2 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Affected versions of this crate passes an uninitialized buffer to a user-provided `Read` implementation. Arbitrary `Read` implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior. Note: there is only UB in the case where a user provides a struct whose `Read` implementation inspects the buffer passed to `read_exact` before writing to it. This is an unidiomatic (albeit possible) `Read` implementation. See h

O3 Security · Impact-Aware SCA

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